Browsing by Author "Hegale, A."
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Item Design and development of MR damper for two wheeler application and Kwok model parameters tuning for designed damper(SAGE Publications Ltd, 2022) Devikiran, P.; Puneet, N.P.; Hegale, A.; Kumar, H.Magnetorheological dampers have been the interest of many researchers for a few decades for the reason of being an effective and rapidly progressing technology in the field of semi-active controlled suspension. The dynamic behaviour of these devices with nonlinear hysteresis is quite a complicated phenomenon. Hence, this paper aims at the design, modelling and simulation of a custom-made MR damper for a two-wheeler vehicle. The Kwok model has been chosen to mathematically model the MR damper. The model parameters have been optimised by minimizing the error difference between experimental and model-generated force results. A PID control is designed to control the damper effectively depending on the deflection of the damper. The two-wheeler vehicle modelled with four degrees of freedom is coupled with a mathematical model of MR damper in front and rear suspension. Further, the dynamic analysis has been performed in MATLAB/Simulink considering random road input for different velocities and current input conditions. The improved performance of MR damper was observed in suppressing road irregularities using a PID controller. As an implementation part of the work, the developed damper has been implemented in a two wheeler vehicle for performance evaluation at on-road testing conditions. The results showed significant improvement in damper performance with increment of constant current controlling MR dampers. © IMechE 2021.Item Multi objective optimization of quarter car parameters for better ride comfort and road holding(2019) Puneet, N.P.; Hegale, A.; Kumar, H.; Gangadharan, K.V.Ride comfort of a vehicle is the measure of complacency that a passenger can experience during the travel. The present work focuses on optimizing the quarter car suspension parameters to provide better ride comfort and road holding. Initially a commercially available damper of a light motor vehicle has been characterized to understand its force- displacement behavior and the damping coefficient of this damper has been determined using this characterization result. These damping coefficient values have been considered for quarter car analysis using Matlab simulink model. Vehicle speed, sprung mass, spring constant are the other parameters considered along with damping constant. Design of experiment has been used to conduct simulation considering the parameters for three levels. Multi objective Genetic algorithm (MOGA) has been used to optimize the input parameters for better ride comfort and road holding. � 2019 Author(s).Item Multi objective optimization of quarter car parameters for better ride comfort and road holding(American Institute of Physics Inc. subs@aip.org, 2019) Puneet, N.P.; Hegale, A.; Kumar, H.; Gangadharan, K.V.Ride comfort of a vehicle is the measure of complacency that a passenger can experience during the travel. The present work focuses on optimizing the quarter car suspension parameters to provide better ride comfort and road holding. Initially a commercially available damper of a light motor vehicle has been characterized to understand its force- displacement behavior and the damping coefficient of this damper has been determined using this characterization result. These damping coefficient values have been considered for quarter car analysis using Matlab simulink model. Vehicle speed, sprung mass, spring constant are the other parameters considered along with damping constant. Design of experiment has been used to conduct simulation considering the parameters for three levels. Multi objective Genetic algorithm (MOGA) has been used to optimize the input parameters for better ride comfort and road holding. © 2019 Author(s).Item Optimal Parameters Identification of Quarter Car Simulink Model for Better Ride Comfort and Road Holding(Springer Science and Business Media Deutschland GmbH, 2021) Puneet, P.; Hegale, A.; Kumar, H.; Gangadharan, K.V.Advancement in vehicle technology has explored many possibilities for improvement, keeping customer satisfaction in mind. One major criterion which a passenger always wishes to possess is ride comfort. But the suspension parameters suitable for a good ride comfort may not support another salient feature called road holding. Hence, in this work an attempt has been made to simultaneously improve the ride comfort and road holding, using a quarter car test model using MATLAB Simulink for a commercial light motor vehicle. Initially, a commercially available passive damper of light motor vehicle has been characterized using dynamic testing machine (DTM) in order to obtain its force–displacement behavior and damping nature. A design of experiment (DOE) has been conducted by taking vehicle velocity, sprung mass, spring stiffness and damping coefficient into consideration, for experimentation using quarter car model. Regression equations have been extracted for relating the problem parameters to both ride comfort and road holding. Analysis of variance (ANOVA) has been used to know the influence of each parameter toward the target response. In the later stage, response surface methodology optimization technique has been used in order to optimize the parameters for better ride comfort and road holding. Optimized parameters are substituted again in the quarter car model, to validate the results obtained during optimization. The present work concluded with an optimal ride comfort and road holding and proved the effectiveness of optimization technique in achieving so. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item The effect of inclination angle of shock absorber on ride comfort and road holding of two-wheeled vehicle(American Institute of Physics Inc. subs@aip.org, 2020) Hegale, A.; Puneet, N.P.; Kumar, H.; Gangadharan, K.V.The main purpose of shock absorber assembled in a vehicle is for ride comfort of passengers and better control of moving vehicle by driver. The shock absorber is assembled in between vehicle body known as sprung mass and a combine mass of wheel and suspension known as unsprung mass. In the present work, the effect of inclination angle of shock absorber on ride comfort and road holding of two-wheeled vehicle has been analyzed. For this study, a commercial viscous damper of a two-wheeled vehicle is characterized for different frequency and sinusoidal stroke to find the damper characteristics. A linear curve is fitted for the maximum velocity versus damping force for rebound and compression region. The fitted curve and a bump road profile used to analyze the ride comfort and road holding of the two-wheeled vehicle for three different inclination angles made by shock absorber. The stiffness of suspension increases due to the inclination which influences the ride comfort and road holding. © 2020 Author(s).